Electric riveting apparatus.



P. P. KOBERT. ELECTMG RWETING AEPARATUS.

AYP-LIUATION FILED JULY l5, 1913.

Patented. May 19, 1914.

2 SHEETS-SHEET 1.

F. P. ROBERT.

ELECTRIC RIVETING APPARATUS.

APPLICATION FILED-JULY 15,1913. l 1,096,923.. t Patented. May 19, 1914.

2 SHEETS-SHEET 2.

c with/lwhich is comico UNITED sTATEs PATENT cyprien.

FRANK KOBERT, 0F NEW HAVENV; CONNECTICUT.

ELECTRIC mirarme arranarns;

To @ZZ whom, it may 'concern Be it knownthat I, FRANK I. Kocn'r, a citizen of the United` States, and residing at New IIa-ven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Electric Itiveting Apparatus, of which the rrd lowing is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to electric riveting, weldingand similar apparatus, and the object'thereot' is to provide an improved device or apparatus of this class which is simple and reliable in operation and comparatively` inexpensive; a further object being to pro vide an improved device or apparatus of the class specified which involves in its construe`- tion an ordinary die or punch press, and which is particularly designed for use in riveting or securing attaching staples or yoke-shaped devices in the thimble-shaped heads oi? strain insulators, but which may be used for other purposes when desired. i

The invention is fully disclosed in the following specilication of which the accompanying drawings Aform a part in which the separate parts of my improvement are des'- ignated bysuitablc reference characters in each of the views, and in which l Figure l is a sideview of an ordinary die or punch press provided with my ilmprovenient, the main or old parts ot' the press being indicated in dotted lines;-Fig. 2 a. front view thereotg-Fig 3 a plan view of a die bed which I employ showing parts of my improved device or apparatus connected therewith, parts oi the construction beingin secliong--Iig 4: a view similar to Fig. 3 butshowiug the parts in a different position ;-l `ig. 5 a 'cross section on the line 5 5 ot Fig. Zig-Fig apcrspective view of an electrode which I cm}' loy;-Fig. 7 a section on the ,liinc -Tof Figi 5, and ;-Fig. 8 a section on the line 8-7-.8 of 5F ig. 7.

' In the', drawing forminglpart of this specifcatioml reference beingg particularly made to Figs, l and 2, I have indicated at a, in

dotted or broken lines, en ordinary die or punch fpressprovided the usual `bed plates a2, and in the practice of my invention I connect with one'side off' the. framework of the press, a bracket VY) tpe top of which is fiuslrwith the' top of the' bed plate c2, and on whioliis mountedian lectric transformer ed circuit wires c2 Specification of Letters Patent. Pai-vented H1337, '19 7 f Q14,

Application filed July 15, 1913. Serial No. 779,088.

and o3 which maybe connectedwith any suitable source of electrical supply. I also mounten the bed plate a? a die bed d which 1s ,fof the same general form as t-he hed plate andin the top of which is a transverse space di, `in which are mounted two'dies or die jaws cl3 and Z4 which are movable transversely of the press and the ends of which are connected with the die bed by a tongue and groove construction as shown at d5.

The end portion al of the die bed, adjacent to the.` transformera is formed independentlyof the rest of said die bed, and is connected therewith by side plates 67, and said end portion d of the diebed is insulated from the remaining part thereof, 'as shown at d8. i

Pivoted to the inner side of the endl portion of the die-bed eZ oppositethe insulatedl portion d, and as shown at d is a lever arm c which extends forwardly and transversely of the die bed, and mounted in said end portion of' the die bed is a transverse cross head c2 similar in form to the dies d3 and d* and provided with a central vertical pin spiral springs f2 which bear on the dif`V d* and on collars f secured to said rod.

The die bed d, or'the insulatedend portion thereof is provided with stops g to limit the outward movement of the die Hand vthe 1body of the die bed is provided adjacent to e the insulated end portion with similar stops g2 which limit the outward 'movement oJ4 the die d", and said die Zis provided with projecting end members -g'a which operate in connection with the stops g2,r andthe body .trally portion ofthe die bed 'is alsofprovided centhereof with stops gwhlehzoperate as stops for'both of the :dies Lf-d* irutheirf movement to the right, OninWardmOv'ment.

The stops g2 consist of pinsvvhichf.` passr vertically through lthe sides of'the die bed and through the bed platea2 of the parts, as clearlyshown in Figs. Zand 5, and the'lower ends of said pins are connected'by across head g5 between which andthe bed plate a2 of the parts are placed sprngsv'g?, and connected centrally with the cross head g isf f a rod g7 with the lower end of which is connected a foot lever gs which is pivoted in the'V back bottom portion of the press frame at g, 5 and the front end portion of which projects forwardly and is adapted to serve as a treadle.

Mounted in the central top portion a3 of the press frame is the usual vvertically movable punch or die plunger it, and at one side of' the part a3 of' the press frame I secure a.

keeper in which is mounted a verticallyl at 7, which normally holds said lever and said plunger rod in a raised posit-ion, the depressed position of said parts being shownv in Figsel and 2. a

Pivotally, connected with the lower end o'f the plunger rod 2 isan electrode block j having a plate extension f2 which projects inI the direction of the transformer c and with which is also connected a spring, copper conductor which is also connected with said transformer, and a. similar conductor k2 is connected with said transformer and with' the die bed al, or the end d thereof.

As hereinbefore stated, my improved riv eting apparatus is particularly designed for v use in securing attaching vnkes or staples in the thimble-shaped heads of strain insulators, and in Figs. l and 5, I have shown at m one of said thimble-shaped heads, and at n one of said yokes or stap es.

The dies d3 and al* areprovided in their adjacent faces with grooves or recesses 0 adapted to receivel the yoke or staple n, 'and the 5normal position of the parts connected with the die bed d is that shown in Fig. t. In the operation of this device, the yoke or staple n is dropped, into position between the dies Z3 and d4, when in the position shown in Fig. 4, and the thimble-shaped cap or head m is placed on said dies, as shown in Figs. l and 5, with the sides of the yoke or staple n extending up through the corresponding holes in the bottom of said thimblefshaped head. The foot lever g8 is then depressed w ich withdraws the stops g2=so that the die d4' may be forced back into connection with the die da, as shown in Fig.l3, by the springs f2, The lever 3 is then depressed and this'forces the electrode block ends of the arms or side portions of the staple or yoke this operation completes the circuit through the conductors k and 71:2 and through said 55 electrode, and through the end portion d j into connection with thel invent-ion as designed for a particular n, as shownin l, and` 'of the die bed d, and through the aies @z3 .said punch or die plunger downwardly, and

the ends of the sides of the staple or ,yoke fn, f are riveted in the cap m, as will be readily understood.

In the bottom of the die bed o is a water chamber p and connected with the oppositeend portions thereof are water supply and discharge pipes p2 and p3, and by means of this construction, the saiddie bed may be kept cool., or approximately so, duringthe operation of the apparatus, by causing a con-` etant circulation of water through the chamba; A

Although I have shown and fl't described my purpose, it will be understood that the said invention is not limited in use to any particu'- lar purpose, and changes in and modifications `of the construction herein described may bc made, within 1the scope of the appended claims, without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention what loo I claim as new .and desire to secure by Leo i ters Pater-.t is

l. In an apparatus of the class described, a lframeprovided with a horizontal transverse die bed, die jaws movable toward and from each otherl and transversely of the die bed and ofthe frame, means for operating said die jaws, an electrical transformer 'mounted at one -side of the frame, a vertically movable die plunger mounted in the 11o frame centrally of andjabove the die bed, another vertically movable plrnger mounted between the die plunger and the transformer and provided at its lower end with an electrede,l and means for passing an electric current through the transformer, the electrodel and the die jaws.

2. In an apparatus of the class described, a 'punch press frame, a die bed mounted i transversely thereof, die jaws mounted in '120 the top of said bed and movable toward Aand from each other and transversely of said die bed and of theframe, and means for perating said jaws, said dievbed being alto pro vided at the sides thereof with stops to limit the movement ofthe die jaws and two of which are vertically movable, an electric transformer mounted at the side of the press frame, said press frame being also provided with a vertically movable die plunger, an-

for passing anelectrie Y p y ltransformer, through Athe electrode and other plunger .mounted Y between the die plunger and the transformer, andprovided at its lower end with an current through said throu 1i thedie'jaws. 4, e

3. an apparatus of the classdescribed, a frame provided with a horizontal die bed one end portion'of Which is insulated, two die jawsmountedthereon Vand movable toward and-from each other and transversely .of the die bmbf-means` for limiting the move Y ment of saidgjaws in opposite directions, and

` toward and t from v tions, land means for said frame being also provided above the die,

means for operating said jawjsi L y n .4. v4Iman apparatus of the class described,l

a. frame provided with a' .horizontal die bed oneend'portion of which isl insulated, two

die }aws molmted 'thereon and movable eachwother' and ,transversely of the die bedmeans 4for limiting the movement of said' jawsV in opposite direc- 'operating' said' jaws,

bed with a v erticaIl movable die lunger andl at one side thereof lwith an e ectrical transformer, and betweenthe vdie plunger and the-transformer with awsup verticallylmovableplunger provlded at its lower end with an'e e flnan apparatus ofthev class described,`

plemental ctrode. Y

,a transverse horia'. frame provldedlwith one end portion of zontal insulated die bed,

l said die'bed being .insulated from the other,

dieja'vvs mounted on said die bed'and-movable 'transversely thereof and :transversely- `,of the frame, l

centrally o'f land above the die bed with a. die

saidframe 'being also provided plunger, and atene sidepf'rvhieh is a supelectro'de, and means piece holders.

plementalplun' er provided at its lovvcrend with an electrode. 'v l v 6. Inl an apparatus of the class described, a frame provided with ajhorizontaldie bed and above said die bed with and at' one sideofwhich is plunger provided at its lowerend with a pivoted electrode, and die jaws mounted on the die bed and movable ltoward and from each-other andy transversely of the die bed and of the frame.

7. In an apparatus of the class described,

a frame provided'with a. transverse die bed' a die plunger, a supplemental versely thereof, a vertically movable die plunger mounted above said die bed, and means for passing an electric current through a work piece held by Sald Work i In testimony that I claim thc'foregoing as my invention I have signed my name in presence of the subscribing witnesses' this 14th day'o July, 1913.

l. I 1 FRANK P. KOBERT. Witnesses: 4

S. ANDREWS,

H, E. TrioMrsoN. 

